.main {
	height: 100%;
	width: 100%;
	position: relative;
}

.div-a {
	position: absolute;
	background-image: url(../../img/login/login_bk.png);
	background-size: 100% 100%;
	height: 100%;
	width: 100%;
}

/* css注释说明： 背景为红色 */
.div-b {
	position: absolute;
	width: 100%;
	height: 100%;
    background-color: transparent;
}

/* 背景为黄色 */
.div-c {
	width:100%;
	position: absolute;
	background-color:white;
}
#left{
	width:30%;
	float: left;
	margin-left: 30px;
	margin-top: 20px;
	font-size:16px;
}
#rg{
	width:30%;
	float:right;
	margin-top: 20px;
	font-size:16px;
}
.user {
	height:40px;
	margin-top:10px;
	border: 0px solid #c00;
	padding-left: 15px;
	font-size: 18px;
	margin-top: 10px; 
	width:100%;
	letter-spacing: 1px;
}

.user-inputName {
	height:30px;
	font-size: 18px;
	letter-spacing: 0px;
	border: 0px;
}

#usersubmit {
	height: 40px;
	width: 200px;
	background: #2f79d0;
	border-radius: 2px;
	border: 2px solid #2f79d0;
	font-size: 18px;
	color: #ffffff;
	letter-spacing: 0px;
	text-align: center;
	margin: 20px auto;
	display: block;
}